Fujitsu AUXB04GALH Service Manual page 173

Trouble shooting 88
Peripheral device FAN not operate
General check procedure
1. Check Error code on the VRF system. (Remote controller, Service tool, etc)
2. Check LED brinks on the controller PCB of DX-KIT
3. Check Error code on the peripheral device.
4. Check non of wrong filed settings or wrong installation.
5. Check if FAN operation stopped by the freeze prevention or the defrosting operation.
Check Point 1 : Power supply
Is not the breaker down?
Instant drop ---------------------- Check if there is a large load electric apparatus in the same circuit.
Momentary power failure ----- Check if there is a defective contact or leak current in the power supply circuit.
Noise ----- Check if there is any equipment causing harmonic wave near electric line
(Neon bulb or electric equipment that may cause harmonic wave).
Check the complete insulation of grounding.
OK
Check Point 2 : LED indication on the controller PCB
LED ON
Check Point 3 : Operation signal output
Check circuit on the terminal ON /OFF SIGNAL(OUTPUT)
Open circuit
Check Point 4 : FAN SIGNAL output
Check circuit on the terminal FAN SIGNAL (OUTPUT)
Check Point 5 : Relay PCB power input DC12V
Check power input CN800 Pin1 - Pin2
NG
Make sure that the operation command (ON signal) is
transfering from the Controller to the DX-Kit controller.
If the ON singal was OK, Replace the Main PCB.
Other tips
Check Field function setting, (External input signal setting)
The Prohibit setting condtions
The operating mode mismatch
Forecast of Cause :
1. Power supply failure
3. DX-Kit Electrical compornent defective
Short circuit
Open circuit
LED Blinking
Check Error code indication on the
remote controller or Service tool
Short circuit
Refer to the service manual for
the peripheral device
and check the trouble shooting tips.
Make sure that the operation command
OK (DC12V)
(ON signal) is transfering from the controller to
the DX-Kit controller.
If the ON singal was OK, Replace the Relay PCB.
04-97
2. Trouble on peripheral device
4. Field setting mismatch